private void radioButtonFastMigration_CheckedChanged(object sender, EventArgs e)
{
if (!radioButtonFastMigration.Checked)
return;
labelMaxParallelism.Visible = true;
textBoxMaxThreads.Visible = true;
labelThreads.Visible = true;
labelTargetFileSize.Visible = false;
textBoxTargetFileSize.Visible = false;
labelGigabytes.Visible = false;
}